Why are they called 3.5 inch drives ?

On 8/26/2020 4:46 PM, Big Al wrote:
On 8/26/20 7:36 PM, this is what VanguardLH wrote:
DerekF wrote:

VanguardLH wrote:

DerekF wrote:

When 3.5 inch drives measure approximately 4 inches wide, 5.8 inches
long and 0.8 inches thick, based on the dimensions of a 1 TB
desktop-class drive.

Size is based on the diameter of the platters, not the case. Obviously
a 3.5" diameter platter cannot fit inside a 3.5" case.

https://en.wikipedia.org/wiki/List_o...e_form_factors
(found using an online search)

I thought it must be that but it must confuse many.

Shugart (who became Seagate) introduced the 5.25" form factor back in
1980 (40 years ago). The 3.5" form factor arrived in 1983 (37 years
ago). The 2.5" form factor arrived in 1988 (32 years ago).

And now we have the little M2 drives. M2. 2242 are 22mmx42mm, kinda small.
That's .866in x 1.654in



Yes, but those are SSDs, not disk drives.

--
Ken